From Archon Arcana - The KeyForge Wiki
Legatus Raptor after being exalted
Legatus Raptor is exalted

When an effect instructs you to exalt a creature, take 1 Æmber from the common supply and place it on that creature.

Note: When a creature with Æmber on it leaves play, the Æmber is placed in the opponent's Æmber pool.

Official rules v1.8 March 2021